Smithsonian® Magic Rocks, 52381

This is NSI Smithsonian Magic Rocks Instant Crystal Growing Kit. Create a brilliant underwater garden. Rocks grow to different heights up to 4" and assorted colors. This science set includes Chemical contents, 1 Space Background Print, 1 Sticker Sheet, 1 Tank and detailed instructions. Adult supervision is required. Smithsonian licensed for quality and accuracy. Great for home schooling, Earth Science lesson or just and afternoon of run for your young scientist.